Caliper drag

So I'm getting ready to put my new M/T aluminum wheels on the front of my Barracuda and I noticed the front calipers are dragging fairly heavily on the disk ... anyone got any ideas?

It's a '68 with the '74 and up swap to disks. Using a Diplomat aluminum master cyl and stock prop valve. I followed the Disc-o-tech article almost to the letter. Car breaks fine and has never given me issues but the drag can't be good for the disk or my ET's!

Any suggestions appreciated.